*,
*::before,
*::after {box-sizing:border-box;margin:0;padding:0;border:0;font:inherit;vertical-align:baseline;}
html,body,div,span,applet,object,iframe,
h1,h2,h3,h4,h5,h6,p,blockquote,pre,
a,abbr,acronym,address,big,cite,code,
del,dfn,em,img,ins,kbd,q,s,samp,
small,strike,strong,sub,sup,tt,var,
b,u,i,center,
dl,dt,dd,ol,ul,li,
fieldset,form,label,legend,
table,caption,tbody,tfoot,thead,tr,th,td,
article,aside,canvas,details,embed,
figure,figcaption,footer,header,hgroup,
menu,nav,output,ruby,section,summary,
time,mark,audio,video {margin:0;padding:0;border:0;font:inherit;vertical-align:baseline;}
article,aside,details,figcaption,figure,
footer,header,hgroup,menu,nav,section {display:block;}
body {line-height:1;}
ol,ul {list-style:none;}
blockquote,q {quotes:none;}
blockquote:before,blockquote:after,
q:before,q:after {content:'';content:none;}
table {border-collapse:collapse;border-spacing:0;}

:root {
  --bg: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --teal: #0f766e;
  --teal-ink: #115e59;
  --surface: #ffffff;
}

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}

body {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px;
  text-align: left;
  line-height: 1.75;
}

h1 {
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Noto Sans", Arial, ui-sans-serif, system-ui, sans-serif;
  font-weight: 200;
  font-size: clamp(2.4rem, 4.8vw, 3.2rem);
  margin-block: 2.6rem 1.2rem;
  letter-spacing: .01em;
  color: var(--teal);
}
h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.1rem);
  margin-block: 2.1rem 1.1rem;
  font-weight: 700;
  color: var(--text);
  position: relative;
}
h2::after {
  content: "";
  display: block;
  width: 64px;
  height: 3px;
  margin-top: .5rem;
  background: var(--teal);
  border-radius: 2px;
}
h3 {
  font-size: clamp(1.28rem, 2.3vw, 1.6rem);
  margin-block: 1.6rem .8rem;
  font-weight: 700;
}
h4, h5, h6 {
  margin-block: 1.25rem .625rem;
  font-weight: 600;
}

p {
  line-height: 1.9;
  margin-block: .9rem;
  color: var(--text);
}
small { font-size: 80%; color: var(--muted); }

a { color: var(--teal-ink); text-decoration: none; }
a:hover, a:focus { text-decoration: underline; }

header { padding-block: 1.25rem 1rem; border-bottom: 1px solid var(--teal); }
main { padding-block: 1.25rem 1rem; }
section + section { margin-top: 2.25rem; }

footer {
  text-align: center;
  color: var(--muted);
  padding-block: 1.25rem;
  font-size: .92rem;
}

ruby rt { font-size: 70%; color: var(--muted); }

/* 会社情報（h2直後のdlをカード化。ボーダー無し） */
section h2 + dl {
  background: var(--surface);
  border: none;
  border-radius: 12px;
  padding: 20px 0;
  box-shadow: 0 1px 2px rgba(2, 6, 23, .06);
}
section h2 + dl > div {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 6px 12px;
  align-items: start;
  padding: 12px 0;
}
section h2 + dl > div + div { border-top: 0; }
section h2 + dl dt {
  color: var(--muted);
  font-weight: 600;
  letter-spacing: .02em;
}
section h2 + dl dd {
  color: var(--text);
  font-weight: 500;
  word-break: break-word;
}

@media (max-width: 640px) {
  body { padding: 20px 16px; }
  section h2 + dl { padding: 16px; border-radius: 10px; }
  section h2 + dl > div {
    grid-template-columns: 1fr;
    gap: 6px 0;
    padding: 12px 0;
  }
  section h2 + dl dt { font-size: .9rem; }
  section h2 + dl dd { font-size: 1rem; }
}

@media (min-width: 1100px) {
  body { max-width: 1040px; }
  section h2 + dl > div { gap: 8px 16px; }
}
ul {
  padding-left: 0;
  margin: .8rem 0;
}
ul li {
  list-style: none;
  position: relative;
  padding-left: 1em;
  margin: .35rem 0;
}
ul li::before {
  content: "・";
  position: absolute;
  left: 0;
  top: .15em;
  color: var(--muted);
}
strong, b { font-weight: 600; color: var(--teal)}